65 C10 Family Project - Idling Problems! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

69MPG · 11-19-2007, 03:15 PM

Well we finally got the motor fired up!

Now we are having trouble keeping her idling.

we have a eldebrock 650 and it sounds like it's staving for gas every 4 to 5 seconds, to a point were it almost dies and then kicks back in. if its running a 2k (rpm) it will drop about 800 before it kicks back in???

I also put a timing light on her, and it starts way advanced then it starts to to drop down to the timing mark, thats when it almost dies, then it jump back to being advanced to much again, and slowly start to come back down to the mark again, and this is the cycle it goes throu

We have an HEI Distributor.

It's been a long time since I had to get a new motor runing, any help, thanks

ZBS 64 · 11-19-2007, 03:37 PM

check for a vacume leake

hewlett2002000 · 11-19-2007, 05:36 PM

04Xrider · 11-19-2007, 06:23 PM

Cup your hands over the carb or use a rag to somewhat choke it. If it picks up and smooths out, you definitly have a vacum leak, and it sounds like you do.

69MPG · 11-20-2007, 09:12 PM

Hey guys thanks, forgot all about vacum leaks!!

But I did try 04Xrider idea

and i did not get any change in idle untill I chocked it of all air possible, which made the engine stall. I think I'm going to send the carb out to be checked out. After all I did pick it up at a swap meet for $25

Mark

wild one · 11-22-2007, 02:22 AM

Mark,

What type of a carb are you using - a quadrajet, holley, edelbrock, or maybe a dualjet two barrel? Have you tried setting the idle mixture screws? Was the carb bolted on with new gaskets, then were the carb to intake bolts evenly tightened? A little more info and a few select adjustments might be all thats needed.

If all else fails there is a carb shop in your area, on market street which is right off of concord blvd if I remember correctly.

11-19-2007, 03:15 PM	#1
69MPG Registered User Join Date: Nov 2007 Location: Concord, Ca. Posts: 19	65 C10 Family Project - Idling Problems! Well we finally got the motor fired up! Now we are having trouble keeping her idling. we have a eldebrock 650 and it sounds like it's staving for gas every 4 to 5 seconds, to a point were it almost dies and then kicks back in. if its running a 2k (rpm) it will drop about 800 before it kicks back in??? I also put a timing light on her, and it starts way advanced then it starts to to drop down to the timing mark, thats when it almost dies, then it jump back to being advanced to much again, and slowly start to come back down to the mark again, and this is the cycle it goes throu We have an HEI Distributor. It's been a long time since I had to get a new motor runing, any help, thanks

11-19-2007, 03:37 PM	#2
ZBS 64 Registered User Join Date: Jun 2007 Location: Port Orchard Washington Posts: 46	Re: 65 C10 Family Project - Idling Problems! check for a vacume leake

11-19-2007, 05:36 PM	#3
hewlett2002000 Registered User Join Date: Dec 2006 Location: Cleveland, Tx Posts: 1,619	Re: 65 C10 Family Project - Idling Problems! __________________ Respect: 1. A feeling of appreciative, often deferential regard; esteem. 2. The state of being regarded with honor or esteem. 3. Willingness to show consideration or appreciation. When you fail to show consideration to others values you are showing disrespect.

11-19-2007, 06:23 PM	#4
04Xrider Registered thread killer Join Date: Nov 2006 Location: Cookson, OK. Posts: 349	Re: 65 C10 Family Project - Idling Problems! Cup your hands over the carb or use a rag to somewhat choke it. If it picks up and smooths out, you definitly have a vacum leak, and it sounds like you do. __________________ !966 stepside, 350 SB, ZZ-4 roller, Crane roller rockers, 0.030 flat tops, airgap intake, 750 Holley, stainless steel headers, edelbrock SDT mufflers, Mark 8 elec fan, 700R-4, column shift

11-20-2007, 09:12 PM	#5
69MPG Registered User Join Date: Nov 2007 Location: Concord, Ca. Posts: 19	Re: 65 C10 Family Project - Idling Problems! Hey guys thanks, forgot all about vacum leaks!! But I did try 04Xrider idea and i did not get any change in idle untill I chocked it of all air possible, which made the engine stall. I think I'm going to send the carb out to be checked out. After all I did pick it up at a swap meet for $25 Mark

11-22-2007, 02:22 AM	#6
wild one Registered......... Join Date: May 2006 Location: Livermore,CA Posts: 288	Re: 65 C10 Family Project - Idling Problems! Mark, What type of a carb are you using - a quadrajet, holley, edelbrock, or maybe a dualjet two barrel? Have you tried setting the idle mixture screws? Was the carb bolted on with new gaskets, then were the carb to intake bolts evenly tightened? A little more info and a few select adjustments might be all thats needed. If all else fails there is a carb shop in your area, on market street which is right off of concord blvd if I remember correctly. __________________ 1966 C10 panel-400 small block/TH 350 combo Nothing is fool proof to a talented fool! Popcorn: Pops at exactly 444 degreese Expands to 44 times it's original size Has a 4 year shelf life



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